Question

How a density bottle works?? How it helps to measure the relative density of water. Please explain..

Answer 1

The density bottle is used to find the density of the liquid, where you need to fill up the density bottle with a specific loquid and put its stopper or lid in a firm fixed postion.Any extra liquid could pass through the lid. The mass M of the bottle along with the content liquid could be found. If you subtract the mass m of the empty bottle from M you get the liquid mass of a known volume. Then the mass of the liquid divided by its volume gives the density of the liquid. Similarly it could be found the density of any othe liquid. The ratio of

the density of two liquids is the relative density of the first liquid to the 2nd liquid.

The handy part here is the accuracy is more if you go by density bottle, as it has a narrower neck, than the cross section area of a jar. The accuracy may be less while judging the level of the liquid in jar.